Message::fromArray( array $array ): self

139    final public static function fromArray(array $array): self140    {141        static::validateFromArrayData($array, [self::KEY_ROLE, self::KEY_PARTS]);142        $role = MessageRoleEnum::from($array[self::KEY_ROLE]);143        $partsData = $array[self::KEY_PARTS];144        $parts = array_map(function (array $partData) {145            return \WordPress\AiClient\Messages\DTO\MessagePart::fromArray($partData);146        }, $partsData);147        // Determine which concrete class to instantiate based on role148        if ($role->isUser()) {149            return new \WordPress\AiClient\Messages\DTO\UserMessage($parts);150        } elseif ($role->isModel()) {151            return new \WordPress\AiClient\Messages\DTO\ModelMessage($parts);152        } else {153            // Only USER and MODEL roles are supported154            throw new InvalidArgumentException('Invalid message role: ' . $role->value);155        }156    }